Unpaid hospital claims

I was hospitalised in June due to severe low iron. I needed urgent blood transfusion. While I was admitted, the gynaecologist that attended to me also suggested that an iron drip also gets administered. To my surprise, Discovery doesn’t want to pay. Firstly they requested motivation from hospital of which the doctor submitted, together with my results. Now they want proof that I have used iron supplements before and for how long. Like what madness is this? The doctor wouldn’t have suggested that medication if it what not necessary. My results were self explanatory. I went for further tests about 2-3 weeks ago and my iron levels are still low. Oral treatment was prescribed. Can you please make me understand this? After 18 years with Discovery and this is the treatment I get. I never requested this medication but my condition was compelling. Why are we paying medical aids when they are failing to process our claims in times of need🤷🏽♀️